Option 'C' - lectures.
Chidings mean preaching, sermons, reprimands, talk seriously to someone.
It may give them a negative view of you and potential damage your future at that college/company.
If this is a true or false question, i'd go with true.
I'm not exactly sure what you're asking....
EDIT: The purpose of signal phrases are to help establish the context for a quotation.
The last one is correct i think, thats what google docs is telling me
